TUOL04 　加速器制御／電磁石と電源１　 8月9日 国際会議室 10:00 - 10:20

第一世代高温超伝導線材を用いた磁石の開発

Developments of HTS Magnets Utilizing First Generation Wire

○鎌倉 恵太，畑中 吉治，福田 光宏，植田 浩史，安田 裕介，依田 哲彦，島田 健司，原 周平（阪大核物理センター）

○Keita Kamakura, Kichiji Hatanaka, Mitsuhiro Fukuda, Hiroshi Ueda, Yuusuke Yasuda, Tetsuhiko Yorita, Kenji Shimada, Shuhei Hara (RCNP, Osaka University)

At RCNP, we have been developing magnets utilizing first generation HTS wire for this decade. HTS materials have advantages over LTS materials. Magnets can be operated at 20 K or higher temperature and cooled by cryocoolers. The cooling structure becomes simpler and the cooling power of a cooler is high. Owing to a large margin in operating temperature, it is possible to excite HTS magnets by AC or pulsed currents without quenching. Three model magnets were fabricated; a mirror coil for an ECR ion source, two sets of race track coils for a scanning magnet, and a 3T super-ferric dipole magnet having a negative curvature. They were excited with AC and pulse currents as well as DC currents and their performance was investigated. After successful tests of proto type models, two magnets have been fabricated for practical use. A cylindrical magnet generates a magnetic field higher than 3.5 T at the center to polarized 210 neV ultra cold neutrons. A dipole magnet is excited by pulse currents in order to deliver accelerated beams to two target stations by time sharing. The design of the dipole magnet and operational performance are discussed.